Air-gage.



AIR GAGE. vAPPLIQMION man Amm, 1921.

Patented Dec. 31, 1918.

nventor Witnesses 4a citizen of the United MARTIN a. Homann', er MINNEAPDLIS, MINNESQTA;

apparition.ineafnigusf1,1917.v seriamaieasaa To all w/wm t may concern Be it known that I, MARTIN A. HOUGEN, States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented a new and n useful Air-Gage, of which the following is a specification.

he device forming the subject matter of this application is adapted to be interposed e Ween an air pump and the nipple of a vehicle tire, for the purpose of ascertaining at any time what pressurehas been attained The invention aims te improve the valve structure of the device, tol improve the gage portion of the structure, and to combine these instrumentalities in an implement which will be portable and capable of being handled conveniently and readily.

It iswithin the province of the disclosure lto imp ovel generally and vto enhance the utility `o deyic'es of that type to which the present Y? vention appertains. i

With the aboveand other objects in view which will appear as the description proclaimed, it c anges in the precise embodiment of the ini made within the scope of what is claimed without departspirit et' the invention.

e accompanying drawings igure l shows in top plan, a gage conin elevation;

Fig.y 3 -is a cross section on the of Fig. 2; and

Fig. 4 is line 3`3 present invention,

a re- Y s own at 3 so that it may be connected readily with the ,coupling of an air pump (not shown). The

tension 4. ln the interior of the body l .there is fashioned a chamber-5 communicat- T1e bore 6 opens into an enlarged recess t A .pasthe chamber 5 f 1- Specication of Letters Patent.

.and `has a lateral mouth APateriited Dec. 3l;

one vend oi"A the body. l. i he saidfendof the body l is provided with a projection v10 which serves to unseat' the valve in thetire nipple, the `laterally vdeflected mouth `9 yel" tie passage 8 opening toone projection 10. Thebody l is circumscribed )y a groove ll. defining a flange 12.5 lThe numeral 1.4 denotes a nut havingy a-rib l5 journaled in the groove 1 Th internally threaded as shown at p it may be engaged with the valve n1 ple of axtire, the bein rotata'blevonjtlie body l as will be maniigst from Figi 2. The passage 8 communicates with a lateral passage 44, l opening through "the -endifovifftlle i 9 opening through 17": is provided at its outer'end with a-langerlS/andinteijposed'between the flange 18 and the neck 2 is a resilient packing to prevent theleakageofV air at rihe val vc i thisv point.I

y valve'. casing I7 iis the neck 2,;thel`tape'red exten; thetapered, bere ringl which is compressed'ag of thc'bore i l I valve casingd'` is .provided with 22, the upper endof wh` atV ounted to' slide aplu-ng-.er `rod '24 equipped vat'itjs'upper yend witlran abutment 25."v compression 'spring 26 'surrounds a--portion off the plunger '24, one end of4 the'` ment'25, and 'theotlicr'end of to slide on the outside of the main tube 29 is an auxiliary tube 32y including an end wall 33. One end of a rod 34 is secured as shown at 35 to the end casing" 17 has a tapered eXten- Y,

ichis enlarged as'sho'wn 'in the bore 22= is Serine @asesina theab'ult: the spring Wall 33 of the auxiliary tube32. The rod 34 passes through the opening 31 in the end o the tube 29. At its inner end the rod 34 is reduced to form a stem 36 deiining a shoulder at the inner end of: the body portion of the rod 34. The stem 36 has a hea plate 38 abuts against the shoulder above defined, and a plate 39 is engaged by the Interposed between the plates 38 and 39, and bound therebetween, is a piston 40 preferably made'of resilient material, the piston 40 having a flange 41 projecting toward the ext 'ision 4, and fitting closely ut slidably against the inner surface of the tube 29. Disposed Within the contour of the tube 29 is a strong com ression spring 42, one en of which abuts against the end Wall 30 of the tube 29, the other end of which abuts against the plate 38. The outer surface of the tube 29 is graduated as shown at 43, and the end 45 of the tube 32 is adapted to coperate with the graduations 43, in a manner Whic pill be clearly understood from the drawings.

In practical operation, the body l is connected with the valve tube of a tire, by threading the nut 14 onto the valve tube o the tire. The projection 10 opens the valve of the tire. The tube of an air pump may be connected with the threaded neck 'When air is forced forwardly by the air pump, the plunger 24 Will move endWise, and the washer 28 on the inner end o' the tire will be unseated from the end of the tubular extension 20 of the valve casing 17. Then air will {iow into the tire which is being uniped up, through the enlarged portion 23 ofthe bore 22, through the bore 22, through the chamber 5, the'pasage 8 and its lateral inouth 9. At the same time, pressure will be communicated to the interior of the main tube 29, through the passage 44 in the extension 4. The air pressure Within the tube 29 will be communicated to the piston head 40, and the spring 42 Will be compressed, the auxiliary tube 82 sliding on the outside of the main tube 29, and the end of the auxiliary tube coacting with the g nations 43, to indicate the pressure Which is being attained in the tire as it is pumped Havin thus described the invention, what is claime is 1. In a device of the class described, a

cated adjacent one end 2. casing threaded into a bore opening at one end through one end of the body, the body being rovidedv with an enlarged chamber into which the other end of Vthe bore opens, the body including a tapered bore opening into the chamber, the tapered bore having an enlarged extension located adjacent one en of the body; a valve casing threaded into the enlarged extension and including a tapere neck fitting in he tapered bore, the casing having an opening therethrough; a valve comprising a stem slidable in the opening of the casing an a head on the stem and ocated in the chamber, the head coacting with the inner end of the tapered neck of the casin and being spaced peripherally from the Wall of the chamber; and spring means for holding the valve in closed position.

2. In a device of the class described, a body including a lateral extension, the body and the extension being equipped with communicating bores, ing at one end through one end of the body, the body being provided With an enlarge chamber into Whichthe other end of the bore of the body opens, the body including a tapered bore opening into the chamber, the taered bore having an enlarged extension loof the body; a valve the enlarged extension and including a tapered neck fitting in the body having tapered bore; a packing Washer surrounding the tapered neck and compressed against the Wall of the tapered bore, having an opening therethrough, the opening being of dierent diameters to deine a shoulder; a rod slidable in the opening; a spring surrounding the rod and abutting against the shoulder; an abutment on the rod and engaging the spring; a head on the rod and located in the enlarged chamber, the head coacting with the inner end of the tapered neck of the valve casing and being spaced peripherally from the Wall of the chamber; and a pressure with the lateral extension of the body.

In testimony that I claim the foregoing as my own, l have hereto aiiixed my signature in the presence of two Witnesses.

MARTIN A. HOUGEN.

' Witnesses:

MARGARET E. GOULD, ANN J. DYBDAHL.

the bore of the body openthe valve casingA gage assembledv 

